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Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-audio.c')
-rw-r--r--drivers/media/usb/em28xx/em28xx-audio.c116
1 files changed, 63 insertions, 53 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-audio.c b/drivers/media/usb/em28xx/em28xx-audio.c
index 4628d73f46f2..8e799ae1df69 100644
--- a/drivers/media/usb/em28xx/em28xx-audio.c
+++ b/drivers/media/usb/em28xx/em28xx-audio.c
@@ -1,25 +1,25 @@
-/*
- * Empiatech em28x1 audio extension
- *
- * Copyright (C) 2006 Markus Rechberger <mrechberger@gmail.com>
- *
- * Copyright (C) 2007-2016 Mauro Carvalho Chehab
- * - Port to work with the in-kernel driver
- * - Cleanups, fixes, alsa-controls, etc.
- *
- * This driver is based on my previous au600 usb pstn audio driver
- * and inherits all the copyrights
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Empiatech em28x1 audio extension
+//
+// Copyright (C) 2006 Markus Rechberger <mrechberger@gmail.com>
+//
+// Copyright (C) 2007-2016 Mauro Carvalho Chehab
+// - Port to work with the in-kernel driver
+// - Cleanups, fixes, alsa-controls, etc.
+//
+// This driver is based on my previous au600 usb pstn audio driver
+// and inherits all the copyrights
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
#include "em28xx.h"
@@ -103,7 +103,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
case -ESHUTDOWN:
return;
default: /* error */
- dprintk("urb completition error %d.\n", urb->status);
+ dprintk("urb completion error %d.\n", urb->status);
break;
}
@@ -165,12 +165,11 @@ static void em28xx_audio_isocirq(struct urb *urb)
dev_err(&dev->intf->dev,
"resubmit of audio urb failed (error=%i)\n",
status);
- return;
}
static int em28xx_init_audio_isoc(struct em28xx *dev)
{
- int i, errCode;
+ int i, err;
dprintk("Starting isoc transfers\n");
@@ -179,16 +178,15 @@ static int em28xx_init_audio_isoc(struct em28xx *dev)
memset(dev->adev.transfer_buffer[i], 0x80,
dev->adev.urb[i]->transfer_buffer_length);
- errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
- if (errCode) {
+ err = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
+ if (err) {
dev_err(&dev->intf->dev,
"submit of audio urb failed (error=%i)\n",
- errCode);
+ err);
em28xx_deinit_isoc_audio(dev);
atomic_set(&dev->adev.stream_started, 0);
- return errCode;
+ return err;
}
-
}
return 0;
@@ -268,14 +266,17 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
if (nonblock) {
if (!mutex_trylock(&dev->lock))
return -EAGAIN;
- } else
+ } else {
mutex_lock(&dev->lock);
+ }
runtime->hw = snd_em28xx_hw_capture;
if (dev->adev.users == 0) {
- if (dev->alt == 0 || dev->is_audio_only) {
- struct usb_device *udev = interface_to_usbdev(dev->intf);
+ if (!dev->alt || dev->is_audio_only) {
+ struct usb_device *udev;
+
+ udev = interface_to_usbdev(dev->intf);
if (dev->is_audio_only)
/* audio is on a separate interface */
@@ -367,9 +368,11 @@ static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream,
if (ret < 0)
return ret;
#if 0
- /* TODO: set up em28xx audio chip to deliver the correct audio format,
- current default is 48000hz multiplexed => 96000hz mono
- which shouldn't matter since analogue TV only supports mono */
+ /*
+ * TODO: set up em28xx audio chip to deliver the correct audio format,
+ * current default is 48000hz multiplexed => 96000hz mono
+ * which shouldn't matter since analogue TV only supports mono
+ */
unsigned int channels, rate, format;
format = params_format(hw_params);
@@ -513,8 +516,9 @@ static int em28xx_vol_put(struct snd_kcontrol *kcontrol,
if (nonblock) {
if (!mutex_trylock(&dev->lock))
return -EAGAIN;
- } else
+ } else {
mutex_lock(&dev->lock);
+ }
rc = em28xx_read_ac97(dev, kcontrol->private_value);
if (rc < 0)
goto err;
@@ -551,8 +555,9 @@ static int em28xx_vol_get(struct snd_kcontrol *kcontrol,
if (nonblock) {
if (!mutex_trylock(&dev->lock))
return -EAGAIN;
- } else
+ } else {
mutex_lock(&dev->lock);
+ }
val = em28xx_read_ac97(dev, kcontrol->private_value);
mutex_unlock(&dev->lock);
if (val < 0)
@@ -586,8 +591,9 @@ static int em28xx_vol_put_mute(struct snd_kcontrol *kcontrol,
if (nonblock) {
if (!mutex_trylock(&dev->lock))
return -EAGAIN;
- } else
+ } else {
mutex_lock(&dev->lock);
+ }
rc = em28xx_read_ac97(dev, kcontrol->private_value);
if (rc < 0)
goto err;
@@ -627,8 +633,9 @@ static int em28xx_vol_get_mute(struct snd_kcontrol *kcontrol,
if (nonblock) {
if (!mutex_trylock(&dev->lock))
return -EAGAIN;
- } else
+ } else {
mutex_lock(&dev->lock);
+ }
val = em28xx_read_ac97(dev, kcontrol->private_value);
mutex_unlock(&dev->lock);
if (val < 0)
@@ -762,7 +769,7 @@ static int em28xx_audio_urb_init(struct em28xx *dev)
if (intf->num_altsetting <= alt) {
dev_err(&dev->intf->dev, "alt %d doesn't exist on interface %d\n",
- dev->ifnum, alt);
+ dev->ifnum, alt);
return -ENODEV;
}
@@ -836,9 +843,8 @@ static int em28xx_audio_urb_init(struct em28xx *dev)
dev->adev.transfer_buffer = kcalloc(num_urb,
sizeof(*dev->adev.transfer_buffer),
GFP_ATOMIC);
- if (!dev->adev.transfer_buffer) {
+ if (!dev->adev.transfer_buffer)
return -ENOMEM;
- }
dev->adev.urb = kcalloc(num_urb, sizeof(*dev->adev.urb), GFP_ATOMIC);
if (!dev->adev.urb) {
@@ -899,9 +905,11 @@ static int em28xx_audio_init(struct em28xx *dev)
int err;
if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR) {
- /* This device does not support the extension (in this case
- the device is expecting the snd-usb-audio module or
- doesn't have analog audio support at all) */
+ /*
+ * This device does not support the extension (in this case
+ * the device is expecting the snd-usb-audio module or
+ * doesn't have analog audio support at all)
+ */
return 0;
}
@@ -977,13 +985,15 @@ card_free:
static int em28xx_audio_fini(struct em28xx *dev)
{
- if (dev == NULL)
+ if (!dev)
return 0;
if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR) {
- /* This device does not support the extension (in this case
- the device is expecting the snd-usb-audio module or
- doesn't have analog audio support at all) */
+ /*
+ * This device does not support the extension (in this case
+ * the device is expecting the snd-usb-audio module or
+ * doesn't have analog audio support at all)
+ */
return 0;
}
@@ -1005,7 +1015,7 @@ static int em28xx_audio_fini(struct em28xx *dev)
static int em28xx_audio_suspend(struct em28xx *dev)
{
- if (dev == NULL)
+ if (!dev)
return 0;
if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR)
@@ -1019,7 +1029,7 @@ static int em28xx_audio_suspend(struct em28xx *dev)
static int em28xx_audio_resume(struct em28xx *dev)
{
- if (dev == NULL)
+ if (!dev)
return 0;
if (dev->usb_audio_type != EM28XX_USB_AUDIO_VENDOR)
@@ -1050,7 +1060,7 @@ static void __exit em28xx_alsa_unregister(void)
em28xx_unregister_extension(&audio_ops);
}
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Markus Rechberger <mrechberger@gmail.com>");
MODULE_AUTHOR("Mauro Carvalho Chehab");
MODULE_DESCRIPTION(DRIVER_DESC " - audio interface");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 21:48:49 +0000